WATER-VAPOR ADSORPTION AND MICROPOROUS STRUCTURE OF CARBON ADSORBENTS .17. ANALYSIS OF EXPERIMENTAL ISOTHERMS FOR WATER-VAPOR ADSORPTION

被引:2
作者
DUBININ, MM
NIKOLAEV, KM
PETUKHOVA, GA
POLYAKOV, NS
机构
[1] Institute of Physical Chemistry, Academy of Sciences of the USSR, Moscow
来源
BULLETIN OF THE ACADEMY OF SCIENCES OF THE USSR DIVISION OF CHEMICAL SCIENCE | 1991年 / 40卷 / 01期
关键词
D O I
10.1007/BF00959622
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Water vapor adsorption for various activated carbons with narrow and wide micropore volume distributions and mesopore surface areas between 40 and 300 m2/g have been investigated. For all the isotherms the point of inflection was determined, which can be taken as the point characterizing the formation of a water adsorption layer on the pore wall surface of carbon adsorbents. To do this the adsorption and desorption branches of the isotherms were approximated according to Weibull's distribution. A good correlation was obtained between values for the water monolayer capacity, calculated from the porous structure parameters of the carbons, and the adsorption values corresponding to the isotherm inflection points (a)inf. For the group of carbons studied the values of relative pressure at the inflection point of the isotherms fell within the range 0.5-0.72.
引用
收藏
页码:20 / 23
页数:4
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